<?php
	/**
	 * TablesTag class
	 * Models the <tables> tag inside an XML Query file
	 * @abstract
	 *   Example
	 *      <tables>
	 *          <table name="documents" alias="doc" />
	 *      </tables>
	 *   Attributes
	 *      None.
	 *   Children
	 *      Can have children of type <table> or <query>
	 *
	 * @author Arnia Sowftare
	 * @package /classes/xml/xmlquery/tags/table
	 * @version 0.1
	 */
	class TablesTag {
		/**
		 * Table list
		 * @var array
		 */
		var $tables;

		/**
		 * constructor
		 * @param object $xml_tables_tag
		 * @param object $xml_index_hints_tag
		 * @return void
		 */
		function TablesTag($xml_tables_tag, $xml_index_hints_tag = NULL){
                    $this->tables = array();

                    $xml_tables = $xml_tables_tag->table;
                    if(!is_array($xml_tables)) $xml_tables = array($xml_tables);

                    if($xml_index_hints_tag){
                        $index_nodes = $xml_index_hints_tag->index;
                        if(!is_array($index_nodes)) $index_nodes = array($index_nodes);
                        foreach($index_nodes as $index_node) {
                            if(!isset($indexes[$index_node->attrs->table])) $indexes[$index_node->attrs->table] = array();
                            $count = count($indexes[$index_node->attrs->table]);
                            $indexes[$index_node->attrs->table][$count] = (object) NULL;
                            $indexes[$index_node->attrs->table][$count]->name = $index_node->attrs->name;
                            $indexes[$index_node->attrs->table][$count]->type = $index_node->attrs->type;
                        }
                    }

                    foreach($xml_tables as $tag){
                        if($tag->attrs->query == 'true'){
                            $this->tables[] = new QueryTag($tag, true);
                        }
                        else {
                            if(isset($indexes[$tag->attrs->name]) && $indexes[$tag->attrs->name])
                                $this->tables[] = new HintTableTag($tag, $indexes[$tag->attrs->name]);
                            else
                                $this->tables[] = new TableTag($tag);
                        }
                    }
		}

		function getTables(){
			return $this->tables;
		}

		function toString(){
			$output_tables = 'array(' . PHP_EOL;
			foreach($this->tables as $table){
				if(is_a($table, 'QueryTag'))
					$output_tables .= $table->toString() . PHP_EOL . ',';
				else
					$output_tables .= $table->getTableString() . PHP_EOL . ',';
			}
			$output_tables = substr($output_tables, 0, -1);
			$output_tables .= ')';
			return $output_tables;
		}

                function getArguments(){
                    $arguments = array();
                    foreach($this->tables as $table)
                           $arguments = array_merge($arguments, $table->getArguments());
                    return $arguments;
                }
	}
?>
